Ebenezee gbiffin



2 Sheets-Sheet'll.

E. GRIFFIN; MACHINES FOR. FORMING SHEET-METAL PIPE COUPLINGS.

I Patented July 17.1877.

N. PEI'ERS. PHOTOJIITNOGRAFHER, WA-SHINGTON. D. C.

2Sheets-'Sheet 2-.

E. GRIFFIN.

. MACHINES FOR FORMING SHEET METAL PIPE COUPLINGS.

$1 193 081 Patented July 17,1877.

WITNESSES:

EBENEZER GRIFFIN, OF SYRACUSE, NEW YORK.

*IMPROVEMENT IN MACHINES FOR FORMING SHEET-METAL PIPE-COUPLINGS.

Specification forming part of Letters Patent No. 193,02, dated July 17, 1877 application filed I May 23, 1,877.

To all whom it may concern.-

Be it known that I, EBENEZER GRIFFIN, of Syracuse, in the county of Onondaga and State of New York, have invented a new and useful Machine for Forming Wrought-Metal Pipe-Couplings, Ferrules, &c., of which the following,taken in connection with the ac companying drawings, is a full, clear, and exact description. V

The purpose of thisinvention is to form,

direct from band or sheet metal, pipe-couplings, thimbles, ferrules, and other similar cylindrical and conical bodies, ready for welding them at the seam.

The invention is fully illustrated in the ac companying drawings, wherein Figure 1 is a front view of the machine in position for receiving the material from which the cylindrical or conical body is to be formed. Fig. 2 is a top view of same; Fig. 3, an end view; Fig. 4, a vertical transverse section on line a: m of Fig. 1. Fig. 5 is a front view of the machine, showing its position when completing the process of forming either a cylindrical or conical body; and Fig.6, a section on line 3 y of Fig. 5. j

' Similar letters ofreference indicate corresponding parts.

A is a strongsubstantial vertical plate or frame, having a horizontal base, mounted on pedestal or legsL L, to which frame the principal parts ofthe machine are attached. a is a mandrel, upon which the cylindrical or conical bodies are formed. It passes through a bush or sleeve, b, in the frame A, and projects at both sides at right angles from said frame. Above the mandrel is a die, c,consisting of a square or'rectang'ular block, having on its under side a semicircular or seg mentalrecess of a diameter sufficiently greater than that of themandrel to allow for the thickness of the mate'rial to be operated on. It is carried vertically by the plunger or piston 11, to which it is detachably connected by a dovetail joint and a set-screw, 8. At the sides of the mandrel, and below the center of same, are dies 0 0 moving horizontally, respectively, in guides 0 6 on the base of the frame A, as will be hereinafter more fully described. l t

The die 0 is provided at its end nearest the opposite side.

mandrel with a forward-projecting thin-edged tongue, t, extending across the upper edge of the die, and parallel with the line of the manwidth of the die, and from its end a short dis tance rearward. I

At the forward end of the guides e e are, respectively, adjustable guide-blocks e 0 supported on set-screws s 8 which pass through the base of the frame A, and are operated underneath. The guide-block e in front of the die 0 is beveled to form an ascending surface toward the mandrel. The two guideblocks are, by means of the set-screws 8 8 set at such relative elevations as to carry, when the machine is in operation, the tongue t of the die 0 between the mandrel and the concavity t of the die c as illustrated in Fig.

5 of the drawing.

The guide 6 consists of an L-shaped casting, resting in an inverted position, with its vertical limb movably on waysw on the outer edge of the base of the frame A, and held in a vertical position by a stud, f, in a projection of the base of the frame, and by a groove on the side of its horizontal portion fitted to a corresponding groove, g, in the frame A.

The top of the horizontal portion forms a table or guide, upon which to convey to the machine the material of which the bodies are to be formed, as indicated by dotted lines in Fig. 1 of the drawing. At the end nearest the mandrel this top surface of the guide e is slightly beveled downward, and terminates with a square or sharp edge parallel to the line of the mandrel, as shown at e. I

The plungerd moves in guides h, and, when elevated, has a lateral play'between the jambs of the guides. It is held against the jamb over the guide a bye spring at the opposite side, as indicated by dotted lines in Fig. 1 of the drawing. The lower portion of the space between the jambs is contracted by a beveled projection, r, on the jamb over the guide 0 and the plunger has a corresponding beveled end or recess in its side, so that the plunger, with the die 0, in its descent, is,by the beveled projection r, gradually forced toward the rocating movement.

The guide a, by means of the set-screw s, is

set to bring the top of thebevel e on the end of the feed-table nearly or quite in coincidence with the end of the die 0 when elevated... As. the said die is brought down by the plunger .01, and gradually carried to one side, it. will, in conjunction with the opposing beveled end 0 of the guide e ,.cut on a bevel from the material placed upon the feed-table;,,a;- blanket which the body is to be formed.

' To brace the die 0 against the side thrust resultant. from this shearing operation, and guide it. in its descent upon the mandrel after cutting the blank, a guide, 03. is secured at the opposite side of the mandrel, and made adjustableto the width. of the die by. its attaching-bolt passing through a, horizontal slot, 13, in, the frame A.

J is agage for regulating the length of the blank of. which the body is to be formed. It

is. pendent from a horizontal screw-shaft, Z, journaled'. in boxes on the guides h h, or other suitable hearings, to admit of. revolving it, and thereby moving the gage bodily longitudinally. The gageis weighted at its lower extremity in such manner as to force it, toward thefaee of the frarneA by its own gravity.

In. order. to. cause itto. move. automatically from under the die.c, and prevent collision.

with same inits descent, the hanger or sup-- porting arm of the gage J is. provided on its. inner side with a beveled projection or shoulder, k, and. the plunger with. av similar pro.- jection,.insuch relative. position that when the plunger is, elevatedthe gage is allowed to fall into its operative position under the. die, and. during the descent of the plunger the contact of the aforesaid shoulders will; force the gageout from under the die 0.

Upon the top of. the frame A, and extended the length of same, isashaft, B, journaled-in.

boxes 0. (Land provided at the. end: with. a

spur-wheel, D,which meshesin pinion E, attached. to shaft F. The latter is extended. horizontally along the rear of the framev A, and has, attached. to its opposite. end. the main driving-pulley P. Directly over the plunger (1 are two eccentrics. or cams, G, at tachedto the shaft B, by whichthe plunger receives its downward pressure. Its upward movement is imparted by a counterpoise, H, on the end. of lever I, which is fulcrumed on the rear of frame A, and engages with the opposite endzof the plunger d. Over the dies 0 a the shaft, B is provided,respectively, with cam-drums K K, having'grooves o v, in which. traverse the: end of levers L L provided with. friction-rollers thereat. The levers L L are. pivoted, nearly or quite at. their center, to the. front of the frame A, and are connected. at their lower extremity, respectively, to thedies- 0 0 The grooves '22 o in the drums. K K are of such contour as to impart, by means of the lovers L L ,'an intermittent rectilinear recip- G and cam-drums K K are arrangednp onthe. shaft B at such angles relative to each other The eccentrics. or. cams. 1

as to cause the diec-to approach the mandrel in advance of the die 0 and. thelatternlnaadvance of the die 0, and recede either in like manner or simultaneously. The first die in its descent cuts, as before described, the blank from the band metal, which has previously been placed on'the top of'the guide 6 and carried forward until it abutted against the gage-J and thence presses the; blank around the top portion of the mandrel at until it gives the blank the shape of an inverted U. The die 0, approaching,, next mounts. the incline of .theguide-block e, and in its ascension bends one of the pendent ends of the blank around the bottom portion of the mandrel. Finally, the die 0 brings the. other end. of the blank around. the mandrel, and pressesit. over, the end held. by the tongue of the die 0 as illustrated in. Fig. 5 of the drawing. v

In order to. adapt the machine for forming, cylindrical and conical. bodies of various diam-- eters, the. mandrel is secured in. the frame by a detachable-bush, b,,so as to allow of' in, serting a larger or smaller mandrel, as may be required, and the. dies are made detachable from their respective carriers to admit of. the same change, and also. of. repairs or. renewal :of said. parts.

L is a lever arranged. vertically. and} rela-. Etively central with the. axis. of themandrel', ipivoted, at its lower extremity, and bearing zwith, its, upper end against a cam, G", on the. gshaft B. Below the frame A it. isconnected with a spring-bar, S, which. is. extended; from l end tov endv of the machine, andsecured at its ends to the pedestals L, L. Atthemandrel' fthe lever L forms an eye,.in, which it holds the rear portion of. themandrel by a set-screw, f m, passing through theleVenIandengaging a ;collar. or bush attached.bathe-mandrel. Duniing the revolution of the shaft B the cam G, g with the aid-of. the spring S, impartsanoscil lating movement to the lever L?', which, in. turn, reciprocatesthe mandrel. The. cam. G iis of such form, andarranged on. the shaftB ;at such anangle. relative to the: eccentrics G' 1 and cam-drums. K K,that the mandreliscaused to remain. stationary during the. process. of forming bodiesv on the mandrel, and. be. re-. tracted when the said. process is completed. iIn retracting the mandrel the body formed lupon it is, by contact. with; the face of the ;frame A or bush b, forced toward the. front 2 end of the mandrel- Before the dies are again brought into actionby their respective cams, gthe lever L? is releasedby thecam G 'andcan Eriedi toward. the machine. by the spring S, bringing with. it, the. mandrel ainto its proper position for the. reception. of. another blank. The next before-described movement. of. the mandrel causes one body. formed". upon the mandrel to forceits preceding one off the end of themandrel. The mandrelisisupportedlat 1 the rear end by. a. guide, it.

Having thus described my invention,.,wliat ,I claim is 1. The combination and arrangement of the mandrel a, dies cc 0", elevated guide-block a,

beveled toward the die 0 and supported on set-screw s and the guide-block e in front of die 0, and having set-screw 8 substantially in the manner and for the purpose described and shown.

2. The combination and arrangement of the guide 0 having bevel e on top of its forward end, the die a, plunger d, and guides h h, having beveled projection 1' at one side of the plunger, and a spring at the opposite side thereof, constructed to operate substantially in the manner specified.

3. The combination and arrangement of the guide 6 having the shape of an inverted L, resting with its vertical limb on way to, and having the end of its horizontal portion fitted in a groove, g, in frame A, the stud f, and setscrew 8 as and for the purpose set forth.

4. The combination, with the die 0, of the guide 0 set-screw s and gage z, secured in sloti in frame A, substantially as and for the purpose described.

,5. The combination of the plunger (1, screwshaft 1, journaled' in boxes on guides h h, and gage J, pendentfrom screw shaft 1, and weighted at its lower extremity, constructed and arranged as described and shown, for the purpose set forth.

6. The combination and arrangement of the shaft B, having cams or eccentrics G G, cam G, and cam-drumsK K, the plunger d, die 0, levers L L, dies 0 a, lever I, counterpoise H, mandrel a, lever L and spring 8, all constructed to operate substantially in the manner described and shown, for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two attesting witnesses, at Syracuse, in the State of New York,

this 18th day of May, 1877.

EBENEZER GRIFFIN.-

Witnesses:

J ON. CRIST. 'A. DE LIMA, E. BENDIXEN. 

